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authorJosef Bacik <josef@redhat.com>2010-01-27 05:07:59 +0300
committerChris Mason <chris.mason@oracle.com>2010-01-29 00:20:39 +0300
commitf48b90756bd834dda852ff514f2690d3175b1f44 (patch)
tree071f502edbe6668f9451d676ae3a0f751da5e105 /fs
parente3acc2a6850efff647f1c5458524eb3a8bcba20a (diff)
downloadlinux-f48b90756bd834dda852ff514f2690d3175b1f44.tar.xz
Btrfs: do not mark the chunk as readonly if in degraded mode
If a RAID setup has chunks that span multiple disks, and one of those disks has failed, btrfs_chunk_readonly will return 1 since one of the disks in that chunk's stripes is dead and therefore not writeable. So instead if we are in degraded mode, return 0 so we can go ahead and allocate stuff. Without this patch all of the block groups in a RAID1 setup will end up read-only, which will mean we can't add new disks to the array since we won't be able to make allocations. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/volumes.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 220dad5db017..66122bdf8bbf 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2538,6 +2538,11 @@ int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
if (!em)
return 1;
+ if (btrfs_test_opt(root, DEGRADED)) {
+ free_extent_map(em);
+ return 0;
+ }
+
map = (struct map_lookup *)em->bdev;
for (i = 0; i < map->num_stripes; i++) {
if (!map->stripes[i].dev->writeable) {